Generally I'll heal ~100 per WS with Life, not a huge amount by any means (Bloodbath will do 3-4x more, but less often and with a chance of wasting it by missing). Speed's drain only occurs on regular hits, but everyone gets the benefit of it and the stamina regen is also good. But yes, HP drain is pretty negligible on both.

Speed seems like the clear winner; I just want to see thoughts :x